/Engine/Source/Runtime/Engine/Public/AnimationRuntime.h
Retarget a single bone transform, to apply right after extraction.
static void RetargetBoneTransform ( const [USkeleton](API\Runtime\Engine\Animation\USkeleton) * SourceSkeleton, const [FName](API\Runtime\Core\UObject\FName) & RetargetSource, FTransform & BoneTransform, const int32 SkeletonBoneIndex, const [FCompactPoseBoneIndex](API\Runtime\AnimationCore\FCompactPoseBoneIndex) & BoneIndex, const [FBoneContainer](API\Runtime\Engine\FBoneContainer) & RequiredBones, const bool bIsBakedAdditive )